Patent US3764247A successfully refreshed from Google Patents.
US3764247A
Expired / Lapsed
US
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Apparatus for molding hardenable materials
Assignee: Dow Chemical Co
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Filing: 1972-05-30
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Granted: 1973-10-09
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Expires: 1992-05-30
Abstract
Abstract Hinged endless belts are employed in a continuous casting machine to define a mold cavity closed on all four sides wherein castable materials such as foamable hardenable plastics are continuously shaped without waste.
Inventors
- 👤 W Garrett
- 👤 T Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:39
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B29C44/306; Y; Y10; Y10S; Y10S264/00; Y10S264/02; Y10S264/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
An apparatus for the continuous casting of hardenable materials, the apparatus comprising in cooperative combination at least a first support and a second support, a first drum and a second drum, at least one first endless forming belt, the forming belt having a central portion, a first edge portion and a second edge portion, the belt having integral hinge portions between the edge portions and the central portions, the forming belt passing over the first drum and the second drum and forming a continuous loop having a forming side and a return side, the belt having a surface which is non-adherent to the hardenable material being formed, means to apply a hardenabLe material to the non-adherent surface, means to deform the belt to form a desired curing configuration for the hardenable material, the means to deform the belt deforming the belt to a degree which does not exceed the elastic limit thereof.
Claim 2
Independent Claim
152 words
An apparatus for the continuous casting of hardenable materials, the apparatus comprising in cooperative combination at least a first support and a second support, a first drum and a second drum, at least one first endless forming belt, the forming belt having a central portion, a first edge portion and a second edge portion, the belt having integral hinge portions between the edge portions and the central portions, the forming belt passing over the first drum and the second drum and forming a continuous loop having a forming side and a return side, the belt having a surface which is non-adherent to the hardenable material being formed, means to apply a hardenabLe material to the non-adherent surface, means to deform the belt to form a desired curing configuration for the hardenable material, the means to deform the belt deforming the belt to a degree which does not exceed the elastic limit thereof.
Claim 3
Dependent Claim
24 words
The apparatus of claim 1 wherein the means to deform the belt deforms the belt to form a configuration having a closed cross-sectional configuration.
Claim 4
Dependent Claim
31 words
The apparatus of claim 1 including a second forming belt oppositely disposed to the first forming belt and adapted to cooperate with the first forming belt and form a closed configuration.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1 wherein the means to deform the belt comprises a plurality of guides which successively deform the belt into a generally cylindrical configuration.
Claim 6
Dependent Claim
14 words
The apparatus of claim 1 wherein at least the continuously hinged belt is polypropylene.
Claim 7
Dependent Claim
37 words
The apparatus of claim 1 wherein the belt has a thickness of from about 20 to 100 mils, the hinge portion being from about 10 mils to 20 to 80 percent of the thickness of the belt.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |